Water-tube steam-generator.



PATENTED JULY 30, 1907.

N. J. SUGKLINGT wATEE TUBE. STEAM GENERATOR.

APPLICATION FILED AUG. 6, 1906.

4 SHEETS-SHEET 1.

THE "mun: PZTIRS cm, WASHINGTON, n. c.

PATENTED JULY 30, 1907.

' N. J. SUGKLING.

WATER TUBE STEAM GENERATOR. APPLICATION TILED A119,, 1906' rmr Mom":PzrERs cu, wAsnmorou, n. c.

PATENTED JULY 30, 1907;

N. J. SUGKLING. WATER TUBE STEAM GENERATOR.

APPLIOA'I'IOH FILED AUG. 8, 1900.

4 SHEETS-SHEET 3.

No- 86l,330'. PATENTED JULY 30, 1907. N. J. SUGKLING.

WATER TUBE STEAM GENERATOR. APPLICATION nun we. e. 1900.

.4 SHEETB-BKEET 4. i

W y 11 Z l '55 J 3 i I /r 1212'\ NEWTON JOHN SUCKLING, OF BRIGHTON,ENGLAND.

WATER-TUBE STEAM-GENERATOR.

Specification of Letters Patent.

Patented July 30, 1907.

- Application filed August 6, 1906. Serial No. 329,475.

To all whomz't may concern:

Be it known that NEWTON JOHN scenario, a subject of the King of GreatBritain, residing at The Drove, Preston Park, Brighton, in the county ofSussex, England, consulting engineer, has invented. certain new anduseful Improvements Relating to Water-Tube Steam-Generators, of whichthe following is a specification.

This invention relates to water-tube steam generators the chief objectsbeing to provide a generator of large water and steam capacity, and ofsimple, effective and economical construction, the arrangement beingsuch as to expose large heating surface to the furnace gases, and topromote a constant and efficient circulation of the Water.

Heretofore it has been customary in the design of water-tube steamgenerators to arrange the various parts in such a manner that the steamproduced may assist in the circulation of the water, but it is nowgenerally admitted that circulation is almost wholly due to thedifferences in temperature of the water in different parts of thegenerator.

According to this invention 1 provide beneath a horizontal water drum ordrums a number of inclined water drums projecting at their extremitiesbeyond the walls of the furnace, so that the rearwardly projectingportions, not being exposed to the furnace gases, are at a lowertemperature than the remaining portions, and consequently produce adescending current of water through neck pieces connecting the aforesaidprojecting portions with each other and with corresp 0nding projectingportions of the horizontal water drum or drums. The inclined water drumsare preferably arranged in vertical rows and are connected by aconvenient number of neck pieces and sets of tubes for liberating thesteam generated, and for promoting and assisting in the constant anduniform circulation of the water. The uppermost of the large inclinedwater drums is in communication with the horizontal water drum in whichthe water level is preferably maintained at or near the center line, sothat the free water surface is as great as practicable. A complete steamgenerator will when of large size usually comprise several sections,each of which consists of a series of inclined water drums, a horizontalwater drum, and suitably arranged neck pieces and connecting tubes asabove described. A steam dome or collector may be situated above andsuitably connected with each of the horizontal water drums pertaining tothe several sections,

and the projecting end of the lowermost of each of the inclined drums isin communication with a mud drum conveniently situated outside thefurnace, so that sediment and other refuse may be easily removed orblown out in the usual way. The rear portions of the inclined andhorizontal water drums and the neck pieces pertaining to and connectingthe same, by being outside the furnace, are at a sufficiently lowtemperature to create a constant downward current or circulation of thewater, the neck pieces and other parts in or near the flues beingprotected from the direct action of the heated gases by being incased inor surrounded by fire-brick or the like so as to prevent said heatedgases from unduly raising the temperature of the neck pieces,

in cases where fines are provided at the back of the furnace.

In order that my said invention may be clearly understood and readilycarried into effect, I will proceed to describe the same more fully withreference to the accompanying drawings in which:

Figure 1 is a longitudinal section of a steam generator constructed inthe manner herein described. Fig. 2 is a vfront elevation and Fig. 3 aback elevation of the same. Fig. 4 is a detail horizontal section on theline 1-1 of Fig. 1. Fig. 4 is a similar detail horizontal sectionillustrating a method of protecting the neck pieces at the back of thefurnace, when a central flue only is employed. Fig. 5 is a longitudinalsectional elevation of a modified form of construction, and Fig. (3 is across-section of the same, the left half of the section being takentowards the back of the generator, and the right half towards the frontthereof. Fig. 7 is a back elevation, and Fig. 8 a front elevation ofthemodified construction, the front casing and door being removed in theleft hand portion of the latter figure. Fig. 9 is a vertical crosssection of a generator provided with flat plates for expanding theconnecting tubes therein. Fig. 10 is a longitudinal section, and Fig. 11a cross sectional'elevation of a generator having a steam dome, andthickened portions in the horizontal and inclined water drums for thepurpose of effecting the expanded joints as hereinafter described. Fig.12 is a cross section of part of a generator in which several sets ofhorizontal and inclined water drums are arranged side by side andinter-connected by connecting tubes.

A represents-the inclined water drums, A the horizontal water drums, Aand A the neck pieces, and A the connecting water drums.

The inclined tubes A, are preferably arranged in vertical rows and havetheir extremities projecting beyond the walls B of the furnace. They areconnected with each other and with the water drums A by means of theneck pieces A and tubes A the rearwardly projecting portions beingconnected by the neck pieces A which are also situated outside thefurnace. The said rearwardly projecting portions of the inclined Waterdrums and the neck pieces A, not being exposed to the furnace gases, areat a lower temperature than the remainder of the generator, andconsequently produce a descending current of water from the horizontalWater drums A through neck pieces A into the inclined Water drums A,whence the water passes up the latter and through the tubes A and neckpieces A back to arranged vertically as in Figs. 6, 9 and 11, orvertically and diagonally as in Figs. 2 and 12 and may be of such anumber and disposition that a constant and perfect circulation of waterthrough the generator is secured.

In order to protect those portions of the neck pieces A which passbeyond the rear wall B of the furnace into the flues C from becomingheated, they maybe surrounded or protected by fire-brick or othersuitable lining B, apertures B being suitably arranged in the rear wallB to enable the products of combustion from the furnace to pass into thesaid flues O and thence to the smoke-stack. For the purpose of absorbingthe greater part of the heat from the furnace gases before they escapeinto the flues, fire-brick or asbestos deflectors D and partitions orbaffles D may be arranged to compel the said gases to travel between andamong the tubes A and in a tortuous or zig-zag course. The saidpartitions or baffles D may be fixed, or may be movable so as tofacilitate in the latter case cleaning and inspection of the variousparts of the generator.

- The horizontal water drums A may be connected with a stem drum or domeE by neck pieces E as shown in Figs. 10 and 11, and the rearwardlyprojecting ends of the lowermost of the inclined water drums A may beconnected with a mud drum F, which, being situated outside the furnacechamber, can be readily cleaned out periodically or entirely removed, ifdesired. Communication between the horizontal drums A is provided bymeans of the drum F through the neck pieces F so that the same level ofwater is maintained in all the drums.

Additional communication between the water in the drums A may beprovided by means of connecting tubes A situated as in Figs. 5 and G ator below the water level so that said level ismaintained the same in allthe drums. Similarly even distribution and equalization of pressure ofthe steam may be afforded by means of tubes A directly connecting thedrums as in Figs. 5 and 6 or expanded into boxes or stools A secured tothe said drums as shown in Figs. 1 and 2, the expanded joints beingrendered easy ofjaccomplishment by means of the openings and coverplates A situated opposite the ends of the tubes A. The stools A canalso be employed for carrying stop valves, safety valves and similarsteam generator accessories. A similar arrangement to that shown at A" Aand A may also be applied-at or below the water levelfor affording anadditional free communication for the water between two or more sectionsand thereby assist in equalizing the water-level in the water-drums. Thefeedwater may be admitted at any suitable point or points in thegenerator, and may conveniently be introduced through an inlet pipe A,at which point the feed-water descends the tubes A, thus becomingsomewhat warmed and depositing some of its sediment in the mud drum Fbefore entering the heated parts of the generator.

One or both ends of the inclined water drums A, horizontal drums A,steam dome E and mud drum F may for this purpose they may be passedthrough the aforesaid drums or replaced from the outside. The said tubesA may be expanded into flat plates A riveted to the inclined water drumsA and horizontal drums A as in Fig. 9, or the said larger drums may beshaped so as to produce these flat surfaces. In a modified form ofconstruction the inclined water drums A and horizontal drums A areconstructed of metal of appropriate thickness, there being sufficientmetal in which to expand the tubes A water-tight joints being readilyobtained, so that leakage is prevented; a portion only of the said tubesor drums may, however, be of the req uisite-thickness to insureefficient expanded joints, the remaining portion being of the usual orordinary degree of thickness, as shown in Figs. 11 and 12.

For marine purposes, or in other situations where space is limited, asingle inclined water drum may be employed as shown in Figs. 5 and 10and brick work may be dispensed with, a suitable framing or metalcasing, lined or protected from heat by fire-brick, as bestos oroth ersuitable material, being substituted.

All the necessary fittings and accessories employed in connection withsteam generators of the water tube type may be used in conjunction withthe generator above described I am aware that it has before beenproposed to construct water tube steam generators with horizontal tubesor drums arranged one above the other and connected by circulatingtubes, and that it has also been proposed to construct generators withhorizontal tubes or drums having portions projecting beyond the furnacewalls and connected by circulating tubes. 1 am also aware that thecirculating tubes have been arranged outside the wall of the steamgenerator. So far as I am aware, however, a steam generator has notbefore been constructed in which the aforesaid features are combined ina steam generator of the kind hereinbefore described.

What I claim and desire to secure by Letters Patent of the United Statesis:

1. In a water tube steam generator, the combination of an inclinedWater'drum, a horizontal water drum situated vertically above saidinclined water drum, furnace walls surrounding said water drums, meanslocated within said wallsfor connecting said water drums, portions ofthe latter projecting at the rear beyond the furnace walls, and meanslocated outside said walls for connecting the rearwardly projectingportions.

2. In a water tube steam generator, the combination of a plurality ofinclined water drums located in a vertical row, a horizontal water drumsituated vertically above said inclined water drums, furnace wallssurrounding said water drums, means located within said walls forconnecting said water drums, portions of the latter projecting at therear beyond the furnace walls, and means located outside said walls forconnecting the rearwardly projecting portions.

3. In a water tube steam generator, the combination of a plurality ofinclined water drums located in a vertical row, a horizontal water drumsituated vertically above said inclined water drums, furnace wallssurrounding said water drums, neck pieces and connecting tubes locatedwithin said Walls for. connecting said Water drums, portions of thelatter projecting at the rear beyond the furnace walls, and neck pieceslocated outside said walls for connecting the rearwardlyprojectingportions.

4. In a water tube steam generator, the combination of a plurality ofinclined water drums located in a vertical row, a horizontal water drumsituated vertically above said inclined water drums, furnace wallssurrounding said water drums, neck pieces and connecting tubes locatedwithin said walls for connecting said water drums, portions of thelatter projecting at the rear beyond the furnace walls. neck pieceslocated outside said walls for connecting the rearwardly projectingportions, and heat resisting material for protecting those portions ofthe last mentioned neck pieces that project into the flues from thedirect action of the furnace gases.

In a water tube steam generator, the combination of a series ofsections, each consisting of an inclined water drum, a horizontal Waterdrum situated vertically above said inclined water drum, furnace wallssurrounding said water drums, means located within said walls forconnecting said water drums, portions of the latter projecting at therear beyond the furnace walls, and means located outside said walls forconnecting the rearwardly projecting portions.

('3. In a water tube steam generator, the combination of a series ofsections, each consisting of an inclined water drum, a horizontal waterdrum situated vertically above said inclined water drum, furnace wallssurrounding said water drums, neck pieces and connecting tubes locatedwithin said walls for connecting said water drums, portions of thelatter projecting at the rear beyond the furnace walls, and neck pieceslocated outside said walls for connecting the rearwardly projectingportions.

7. In a water tube steam generator, the combination of a series ofsections, each consisting of a plurality of inclined water drums locatedin a vertical row, a horizontal water drum situated vertically abovesaid inclined water drums, furnace Walls surrounding said Water drums,means located within said walls for connecting said Water drums,portions of the latter projecting at the rear beyond the furnace walls,and means located outside said walls for connecting the rearwardlyprojecting portions.

8. In a water tube steam generator, the combination of a series ofsections, each consisting of a plurality of-inclined water drums locatedin a vertical row, a horizontal water drum situated vertically abovesaid inclined water drums, furnace walls surrounding said water drums,neck pieces and connecting tubes located within said walls forconnecting said water drums, portions of the latter projecting at therear beyond the furnace walls, and neck pieces located outside saidWalls for connecting the rearwardly projecting portions.

9. In a water tube steam generator, the combination of a series ofsections, each consisting of an inclined Water drum, a horizontal waterdrum situated vertically above said inclined water drum, furnace wallssurrounding said water drums, neck pieces located within said walls forconnecting said water drums, portions of the latter projecting at therear beyond said furnace walls, neck pieces located outside said wallsfor connecting said rearwardly projecting portions, and a transverse muddrum connected with each of said inclined water drums at theirrearwardly projecting portions.

10. In a water tube steam generator, the combination of a series ofsections, each consisting of a plurality of inclined water drums locatedin a vertical row, a horizontal water drum situated vertically abovesaid inclined water drums, furnace Walls surrounding said water drums,neck pieces located within said walls for connecting said water drums,portions of the latter projecting at the rear beyond said furnace walls,neck pieces located outside said Walls for connecting said rearwardlyprojecting portions and a transverse mud drum connected with each of thelowermost of said inclined water drums at their rearwardly pro jectingportions.

11. In a water tube steam generator, the combination of a series ofsections, each consisting of an inclined water drum, a horizontal waterdrum situated vertically above said inclined Water drum, furnace wallssurrounding said water drums, neck pieces located within said walls forconnecting said water drums, portions of the latter projecting at therear beyond said furnace walls, neck pieces located outside said wallsfor connecting said rearwardly projecting portions, a transverse muddrum connected with each of said inclined water drums at theirrearwardly projecting portions, and deflectors and baffles within saidfurnace walls to control the passage of the products of combustion.

12. In a water tube steam generator, the combination of a series ofsections, each consisting of a plurality of inclined water drums locatedin a vertical row, a horizontal water drum situated vertically abovesaid inclined water drums, furnace walls surrounding said water drums,neck pieces located within said walls for connecting said water drums,portions-0f the latter projecting at the rear beyond said furnace walls,neck pieces located outside said walls for connecting said rearwardlyprojecting portions, a transverse mud drum connected with each of thelowermost of said inclined water drums at their rearwardly projectingportions, and deflectors and ballles within said furnace walls tocontrol the passage of the products of combustion.

In testimony whereof I aliix my signature in presence of two witnesses.

NEWTON JOHN SUCKLING.

Witnesses ALEXANDER HOUSTON, Fnnonmc Knnon.

